we were talking during the workshop and on the simple things to help. 

- watch points with history of the value.

- stop if the value of an instance variable is getting irregular i.e., 

       = you get integer and suddenly inside you get a float!

       1 1 1 1 2 3 4 2 2 1 1 12 2  3 32 1 1 1 1  22 1 1 1 1 1 1 1 2  33 1.2 2 3 3 4 4

- start to monitor (put alarm/breakpoints)  newly created instances from a point

I hope that soon we will have instance specific features of the Ressia debugger

in Pharo debuger (stop the next time this object receive a message, stop the next 

tie this object changes any of its instance variables).